Here is a kit that makes the fuel ready to use without modifying the car.
http://sweethomebiofuel.com/
He has I believe about 120,000 miles on his Ford, and it still runs strong. Runs on any kind of vegetable oil, soybean, etc. I haven't talked to him in a few months, but he said at one time taht people have to process the fuel themselves as if he sells it by the gallon it would be illegal.
I should add that he spilled 500 gallons of that stuff on his property, no hazmat needed. Much better than diesel in all aspects.